int merah = 13;
int kuning = 12;
int hijau = 11;

void setup() {
  // put your setup code here, to run once:
  // Serial.begin(9600);
  pinMode(merah, OUTPUT);
  pinMode(kuning, OUTPUT);
  pinMode(hijau, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:

digitalWrite(merah, HIGH);
delay(500);
digitalWrite(merah, LOW);
delay(500);

digitalWrite(kuning, HIGH);
delay(1000);
digitalWrite(kuning, LOW);
delay(1000);

digitalWrite(hijau, HIGH);
delay(1500);
digitalWrite(hijau, LOW);
delay(1500);
}